package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.ss.formula.functions.Address;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WebSocketServer webSocketServer;
    //用户下单
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //处理各种业务异常,地址簿为空,购物车数据为空
     AddressBook addressBook= addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
     if (addressBook==null){
         //抛出异常
         throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
     }
         //查询当前用户的购物车数据
         Long userId= BaseContext.getCurrentId();
         ShoppingCart shoppingCart=new ShoppingCart();
         shoppingCart.setUserId(userId);
         List<ShoppingCart> shoppingCartList=shoppingCartMapper.list(shoppingCart);

         if(shoppingCartList==null||shoppingCartList.size()==0){

             //抛出业务异常
             throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
         }





        //向订单表插入一条数据
        Orders orders=new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setPayStatus(Orders.UN_PAID);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setUserId(userId);
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());

        orderMapper.insert(orders);

        List<OrderDetail> orderDetailList=new ArrayList<>();
        //向订单明细表插入n条数据

        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail=new OrderDetail();//订单明细
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());//设置当前订单id关联的id
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);

        //清空购物车数据
        shoppingCartMapper.deleteByUserId(userId);

        //封装vo返回结果
        OrderSubmitVO orderSubmitVO=OrderSubmitVO.builder()
                .id(orders.getId())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .orderTime(orders.getOrderTime())
                .build();

        return orderSubmitVO;
    }

    @Override
    public PageResult pageQuery(int pageNum, int pageSize, Integer status) {
        //设置分页
        PageHelper.startPage(pageNum,pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO=new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        //分页条件查询
        Page<Orders> page=orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> list=new ArrayList();

        //循环查询出订单明细,并封装到vo中返回
        if(page!=null&&page.getTotal()>0){
            for (Orders orders : page) {
                Long ordersId= orders.getId();//订单id
                //查询订单明细
                List<OrderDetail> orderDetails=orderDetailMapper.getByOrderId(ordersId);
           OrderVO orderVO=new OrderVO();
           BeanUtils.copyProperties(orders,orderVO);
           orderVO.setOrderDetailList(orderDetails);

           list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(),list);
    }


    //查询订单详情
    @Override
    public OrderVO details(Long id) {
        //根据id查询订单
     Orders orders= orderMapper.getById(id);
        //根据订单id查询订单对应的菜品,套餐明细
        List<OrderDetail> orderDetailList=orderDetailMapper.getByOrderId(orders.getId());

        //封装vo返回
        OrderVO orderVO=new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    //取消订单
    @Override
    public void userCancelById(Long id) throws Exception {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //效验订单时候存在
        if (ordersDB==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //判断订单状态//订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消

        if(ordersDB.getStatus()>2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders=new Orders();
        orders.setId(ordersDB.getId());
        //如果订单处于待接单的状态需退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            weChatPayUtil.refund(
                    ordersDB.getNumber(), //商户订单号
                    ordersDB.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额
            //支付状态改为退款
            orders.setStatus(Orders.REFUND);
        }

        //更新订单的状态,取消原因,取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    //再来一单
    @Override
    public void repetition(Long id) {
        Long userId =BaseContext.getCurrentId();
        //根据订单id查询订单数据
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        //将订单详情对象转换为购物车对象
List<ShoppingCart> shoppingCartList=orderDetailList.stream().map(x->{
    ShoppingCart shoppingCart=new ShoppingCart();
    //将原订单详情里面的菜品信息重新复制到购物车对象中
    BeanUtils.copyProperties(x,shoppingCart,"id");
    shoppingCart.setUserId(userId);
    shoppingCart.setCreateTime(LocalDateTime.now());
    return shoppingCart;
}).collect(Collectors.toList());
//将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    //条件订单搜索
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
     PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
     Page<Orders> page=orderMapper.pageQuery(ordersPageQueryDTO);

     //部分订单状态需要额外返回订单菜品信息,将Order转换为OrderVO
        List<OrderVO> orderVOList=getOrderVOList(page);
        return new PageResult(page.getTotal(),orderVOList);
    }



    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        //需要返回订单菜品信息,自定义OrderVO响应结果
        List<OrderVO> orderVOList=new ArrayList<>();

        List<Orders> ordersList=page.getResult();
        if(!CollectionUtils.isEmpty(ordersList)){
            for (Orders orders : ordersList) {
                //将共同字段复制到OrderVO
                OrderVO orderVO=new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                String orderDishes=getOrderDishesStr(orders);

                //将订单菜品信息封装到orderVO中,并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
return orderVOList;
    }

//    根据订单id获取菜品信息字符串
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());
        //将该订单对应的所有菜品信息拼接到一起
        return  String.join("",orderDishList);
    }

    @Override
    public OrderStatisticsVO statistics() {
    //根据各个状态查询其数量
        Integer toBeConfirmed=orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed=orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress=orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);


        //将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO=new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    //接单
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
Orders orders=Orders.builder()
        .id(ordersConfirmDTO.getId())
        .status(Orders.CONFIRMED)
        .build();
orderMapper.update(orders);
    }


    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */

    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {

        // 当前登录用户id

        Long userId = BaseContext.getCurrentId();

        User user = userMapper.getById(userId);


        //调用微信支付接口，生成预支付交易单

//    JSONObject jsonObject = weChatPayUtil.pay(

//        ordersPaymentDTO.getOrderNumber(), //商户订单号

//        new BigDecimal(0.01), //支付金额，单位 元

//        "苍穹外卖订单", //商品描述

//        user.getOpenid() //微信用户的openid

//    );

//

//    if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {

//  throw new OrderBusinessException("该订单已支付");

//    }


        JSONObject jsonObject = new JSONObject();

        jsonObject.put("code", "ORDERPAID");

//


        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);

        vo.setPackageStr(jsonObject.getString("package"));


        //为替代微信支付成功后的数据库订单状态更新，多定义一个方法进行修改

        Integer OrderPaidStatus = Orders.PAID; //支付状态，已支付

        Integer OrderStatus = Orders.TO_BE_CONFIRMED;  //订单状态，待接单


        //发现没有将支付时间 check_out属性赋值，所以在这里更新

        LocalDateTime check_out_time = LocalDateTime.now();

        String orderNumber = ordersPaymentDTO.getOrderNumber();
        orderMapper.updateStatus(OrderStatus, OrderPaidStatus, check_out_time, orderNumber);

        return vo;

    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

    }

    //拒单
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {

        //根据id查询订单
        Orders ordersDB=orderMapper.getById(ordersRejectionDTO.getId());
        //订单只有存在且状态为2(待接单)的状态才可以拒单
        if(ordersDB==null||!ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //支付状态
//        Integer payStatus= ordersDB.getPayStatus();
//        if(payStatus==Orders.PAID){
//            //用户已支付,需要退款
//            String refund=weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//                    log.info("申请退款返回结果{}",refund);
//        }
        //拒单需要退款,根据订单id更新订单状态、拒单原因、取消时间
        Orders orders=new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    @Override
    //取消订单
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        //通过id获取订单
        Orders ordersDB=orderMapper.getById(ordersCancelDTO.getId());
        //获取支付状态,如果 已经付款,退款
//        Integer payStatus=ordersDB.getPayStatus();
//        if(payStatus==Orders.PAID){
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
//        }

        //管理端取消订单需要退款,根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    //派送订单
    @Override
    public void delivery(Long id) {
        //根据id查询订单
        Orders ordersDB=orderMapper.getById(id);
        //校验订单是否存在,并且状态为3
        if(ordersDB==null||!ordersDB.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders=new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    //完成订单
    @Override
    public void complete(Long id) {
        //根据id查询订单
        Orders ordersDB=orderMapper.getById(id);
        //校验订单是否存在,并且状态为4
        if(ordersDB==null||!ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders=new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(orders);

    }

    //客户催单
    @Override
    public void reminder(Long id) {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        //校验订单是否存在
        if(ordersDB==null){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Map map=new HashMap();
        map.put("type",2);//1表示来单提醒,2表示客户催单
        map.put("ordreId",id);
        map.put("content","订单号:"+ordersDB.getNumber());

        //通过websocket向客户浏览器推送消息
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
}
